Over 20 injured in Shenyang underpass gas explosion

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Firefighters work at the accident site after a gas explosion occurred in an underground shopping street in Shenyang, capital of northeast China's Liaoning Province, March 4, 2013. More than 20 workers were injured in the explosion triggered by a gas leak from underground pipelines at a construction site in the underground shopping street in front of a shopping mall on Monday morning. Some 40 workers were at the scene at the time of the explosion.